JPH0550268A - Method for joining parts made of titanium nickel alloy and different metallic parts - Google Patents

Abstract

PURPOSE:To provide the method which can securely and efficiently join titanium-nickel parts and other different metallic CONSTITUTION:The joint part 11 of the titanium-nickel alloy parts 1 is molded thick and this thick joint part is pressed to the prescribed section of the different metallic parts 2. These parts are then joined by heating the above-mentioned thick joint parts to a high temp. Since the titanium-nickel parts 1 and the different metallic parts 2 are securely and stably joined, an important contribution is made to the technical fields where the titanium-nickel alloy parts having high functions are demanded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining a titanium / nickel alloy part and a dissimilar metal part, and is a highly functional titanium / nickel alloy (shape memory alloy) , Super-elastic alloys) for spectacle parts can be greatly advanced.

[0002]

2. Description of the Related Art As is well known, some titanium-nickel alloys have excellent so-called "shape memory" that restores the original shape by history of a predetermined temperature even when deformed, Many high-performance alloys rich in so-called "superelasticity" have been developed that exhibit extremely tough elasticity.

If such a high-performance titanium-nickel alloy can be utilized as a spectacle material, for example, the performance of the spectacle frame is greatly improved, and it is much more comfortable to wear than a spectacle frame using a normal metal material. It is possible to provide a good and long-lasting product.

However, it has been conventionally said that it is very difficult to join a high-performance titanium-nickel alloy of this kind to a dissimilar metal material. A method of mechanically joining with fastening parts such as screws and rivets, b. A method of plating a surface of a titanium-nickel alloy material with a metal having a high brazing property, and brazing the metal of a different type with the plated metal interposed, has been conventionally used.

However, the following dissatisfaction has been heard regarding such a conventional joining technique of a titanium-nickel alloy and a dissimilar metal.

That is, in the former mechanical joining method of joining using fastening parts such as screws and rivets, there is a problem that the fastening parts project at the joining part and the product design is impaired. -In the latter plating joining method, in which the surface of the nickel alloy is plated and then brazed, the joining strength depends on the peeling strength of the plated metal at the joining portion, and peels off when a strong external force is applied. Is a problem.

[0007]

The present invention has been made in view of the above-mentioned problems in the conventional joining technique for joining a titanium / nickel alloy and a dissimilar metal. It is a technical object to provide a new method capable of firmly and efficiently joining dissimilar metal parts.

[0008]

Means adopted by the present inventor to solve the above technical problems will be described below with reference to the accompanying drawings.

That is, the present invention relates to a method for joining a titanium / nickel alloy part and a dissimilar metal part. The gist of the present invention is that the part to be joined is formed thick and the joint 11 Titanium-nickel alloy parts 1
When joining the titanium / nickel alloy material to the predetermined portion 21 of the dissimilar metal component 2, the joining portion 11 of the titanium / nickel alloy component 1 is joined to the titanium / nickel alloy material thickening means. The joint portion is strengthened by adopting a special welding means of titanium / nickel in which the joint portion 11 of the titanium / nickel alloy component 1 is heated and welded by being brought into contact with a predetermined portion 21 of the dissimilar metal component 2. The purpose is to strengthen the joint strength and suppress the weakening due to welding heat. Note that the dissimilar metal parts here mean parts for product construction molded from metals other than titanium / nickel alloys, such as nickel / copper alloy parts, nickel / chromium alloy parts, and pure titanium parts. Includes parts.

【Example】

The present invention will be described in more detail below with reference to the embodiments shown in the accompanying drawings. In the drawing, what is indicated by reference numeral 1 is a part of titanium / nickel / vanadium shape memory alloy with a length of 3.5 cm and a wire diameter of 1.5 mm. Half of the part is hidden due to the side view. Although it is not, the overall shape is a spectacle bridge component curved in a ∩ shape, and the region with a length of 4 mm near both ends thereof is molded into a thick wall with an average wire diameter of 3.5 mm to form the joint 11.

Reference numeral 2 indicates a rim frame having an average wire diameter of 2 mm obtained by subjecting a titanium-zirconium alloy to metal working such as turks head rolling and bending.

In the present embodiment, the ∩-shaped bridge 1 is held by the upper die jig A, the rim frame 2 is held by the lower die jig B, and the joint portions 11 of the bridge 1 are illustrated. Not to chuck the electrode, voltage 300 V, current 2000 A
A large current is applied to heat and melt the joint portion 11 to generate 100-
When pressurized at 250 Kg / cm ² pressure, the bridge 1 and the rim frame 2 were joined in the state shown in FIG.

The joint strength of the titanium / nickel alloy bridge 1 and the titanium / zirconium alloy rim frame 2 thus obtained was measured by an autograph universal testing machine (pulling speed: 5 mm / mi
T-shaped adhesive strength test using n) showed 16.2Kg / m
A very strong joining result of m ² was measured. Then, the elasticity of the bridge 1 was hardly changed.

The embodiment in which the present invention is applied to the bridge portion of the spectacle frame is generally as described above, but the present invention is by no means limited to the above-mentioned embodiment, and is described in "Claims". Which is applicable to joining of titanium / nickel alloy parts and dissimilar metal parts, such as joining the pad arm of the nose pad and the rim frame 2 in place of the titanium / nickel alloy bridge 1, and the like. It can be widely used to join parts to each other in a frame, and even when it is necessary to join titanium / nickel alloy parts to a dental orthodontic appliance.

【The invention's effect】

As described in the above embodiments, according to the present invention, titanium / nickel alloy parts and dissimilar metal parts, which have been extremely difficult to join in the past, are efficiently joined in a very strong and stable state. It is possible to achieve high-performance titanium, which was blocked due to the difficulty of joining.
In addition to being able to greatly contribute to the use of nickel alloys (shape memory alloys, superelastic alloys, etc.) in eyeglass parts, it will also contribute largely to other technical fields that require highly functional titanium-nickel alloys.

[Brief description of drawings]

FIG. 1 is a side view showing one step in the present embodiment in a state where a bridge is held by an upper die jig and a rim frame 2 is held by a lower die jig B.

FIG. 2 is a partially enlarged explanatory view showing an enlarged joint portion between a bridge and a rim frame joined by the method of the present embodiment.

FIG. 3 is a front view showing a state immediately after joining a bridge and a rim frame joined by applying the method of the present embodiment.

[Explanation of symbols]

 1 Titanium / nickel alloy parts (bridge) 2 Dissimilar metal parts (rim frame) 11 Joints

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B23K 103: 18

Claims (5)

[Claims] 1. When joining a titanium / nickel alloy part in which a portion to be joined is formed into a thick portion to form a joining part to a predetermined portion of a dissimilar metal part, the joining portion of the titanium / nickel alloy part is different from each other. Titanium / nickel characterized by being abutted on a predetermined part of a metal part, heating the joint part of the titanium / nickel alloy part to a high temperature and applying strong pressure to weld the joint part, and strengthening the joint part by thick wall A method for joining alloy parts and dissimilar metal parts. 2. The method for joining a titanium / nickel alloy part and a dissimilar metal part according to claim 1, wherein both the titanium / nickel alloy part and the dissimilar metal part are spectacle parts. 3. A titanium-nickel alloy part is a bridge of a spectacle frame curved in a ∩ shape, and a thick-walled joint part is provided in the vicinity of both ends thereof, while the dissimilar metal part is a pair of left and right titanium parts. The titanium / nickel alloy component according to claim 1 or 2, which is an alloy rim frame, in which joint portions at both ends of the bridge are heated to a high temperature and are crushed and welded at predetermined positions of rim frames arranged on both left and right sides. And the method of joining dissimilar metal parts. 4. The method for joining a titanium / nickel alloy component and a dissimilar metal component according to claim 1 or 2, wherein the titanium / nickel alloy component is a pad arm of a nose pad. 5. The titanium according to claim 1, wherein the dissimilar metal component is a spectacle component obtained by molding a titanium alloy or a titanium or nickel-chromium alloy.
A method for joining nickel alloy parts and dissimilar metal parts.